Remediation and phytotoxicity of decabromodiphenyl ether contaminated soil by zero valent iron nanoparticles immobilized in mesoporous silica microspheres

Yingying XIE, Wan CHENG, Po Keung Eric TSANG, Zhanqiang FANG

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Polybrominated diphenyl ethers (PBDEs) are a new class of environmental pollutants which easily accumulated in the soil, especially at e-waste sites. However, knowledge about their phytotoxicity after degradation is not well understood. Nano zero valent iron (nZVI) immobilized in mesoporous silica microspheres covered with FeOOH (SiO₂@FeOOH@Fe) synthesized in this study was utilized to remove decabromodiphenyl ether (BDE209) from soil. Results revealed that the removal efficiency of BDE209 can be achieved 78% within 120 h using a dosage of 0.165 g g⁻¹ and a pH of 5.42. Furthermore, the removal efficiency enhanced with increasing soil moisture content and the decreasing of initial BDE209 concentration. Phytotoxicity assays (biomass and germination rate, shoots and roots elongation of Chinese cabbage) were carried out to provide a preliminary risk assessment of treated soil for the application of SiO₂@FeOOH@Fe. Copyright © 2015 Elsevier Ltd.
Original languageEnglish
Pages (from-to)478-483
JournalJournal of Environmental Management
Volume166
Early online dateNov 2015
DOIs
Publication statusPublished - Jan 2016

Fingerprint

phytotoxicity
Remediation
Microspheres
ether
Ethers
remediation
silica
Silica
Iron
Nanoparticles
Soils
soil
Soil moisture
PBDE
Risk assessment
Elongation
Assays
moisture content
germination
Biomass

Citation

Xie, Y., Cheng, W., Tsang, P. E., & Fang, Z. (2016). Remediation and phytotoxicity of decabromodiphenyl ether contaminated soil by zero valent iron nanoparticles immobilized in mesoporous silica microspheres. Journal of Environmental Management, 166, 478-483.

Keywords

  • Polybrominated diphenyl ethers
  • Soil
  • Remediation
  • Nanoparticles
  • Phytotoxicity
  • Chinese cabbage